<?php

/**
 * @author        YangHuan
 * @datetime    
 * @version        1.0.0
 */

/**
 * Short description.
 *
 * Detail description
 * @author       
 * @version      1.0
 * @copyright    
 * @access       public
 */
class My_DisplayTree {
	/**
	 * Description
	 * @var       
	 * @since     1.0
	 * @access    private
	 */
	public $data = array ( );
	
	/**
	 * Description
	 * @var       
	 * @since     1.0
	 * @access    private
	 */
	public $child = array (- 1 => array ( ) );
	
	/**
	 * Description
	 * @var       
	 * @since     1.0
	 * @access    private
	 */
	public $layer = array (- 1 => - 1 );
	
	/**
	 * Description
	 * @var       
	 * @since     1.0
	 * @access    private
	 */
	public $parent = array ( );
	
	/**
	 * Short description. 
	 *
	 * Detail description
	 * @param      none
	 * @global     none
	 * @since      1.0
	 * @access     private
	 * @return     void
	 * @update     date time
	 */
	function Tree($value) {
		$this->setNode ( 0, - 1, $value );
	} // end func
	

	/**
	 * Short description. 
	 *
	 * Detail description
	 * @param      none
	 * @global     none
	 * @since      1.0
	 * @access     private
	 * @return     void
	 * @update     date time
	 */
	function setNode($id,$parent,$value) {
		$parent = $parent ? $parent : 0;
		
		$this->data [$id] = $value;
		$this->child [$id] = array ( );
		$this->child [$parent] [] = $id;
		$this->parent [$id] = $parent;
		
		if (! isset ( $this->layer [$parent] )) {
			$this->layer [$id] = 0;
		} else {
			$this->layer [$id] = $this->layer [$parent] + 1;
		}
	} // end func
	

	/**
	 * Short description. 
	 *
	 * Detail description
	 * @param      none
	 * @global     none 
	 * @since      1.0
	 * @access     private
	 * @return     void
	 * @update     date time
	 */
	function getList(&$tree,$root = 0) {
		foreach ( $this->child [$root] as $key => $id ) {
			$tree [] = $id;
			
			if ($this->child [$id])
				$this->getList ( $tree, $id );
		}
	} // end func
	

	/**
	 * Short description. 
	 *
	 * Detail description
	 * @param      none
	 * @global     none
	 * @since      1.0
	 * @access     private
	 * @return     void
	 * @update     date time
	 */
	function getValue($id) {
		return $this->data [$id];
	} // end func
	

	/**
	 * Short description. 
	 *
	 * Detail description
	 * @param      none
	 * @global     none
	 * @since      1.0
	 * @access     private
	 * @return     void
	 * @update     date time
	 */
	function getLayer($id,$space = false) {
		return $space ? str_repeat ( $space, $this->layer [$id] ) : $this->layer [$id];
	} // end func
	

	/**
	 * Short description. 
	 *
	 * Detail description
	 * @param      none
	 * @global     none
	 * @since      1.0
	 * @access     private
	 * @return     void
	 * @update     date time
	 */
	function getParent($id) {
		return $this->parent [$id];
	} // end func
	

	/**
	 * Short description. 
	 *
	 * Detail description
	 * @param      none
	 * @global     none
	 * @since      1.0
	 * @access     private
	 * @return     void
	 * @update     date time
	 */
	function getParents($id) {
		while ( $this->parent [$id] != 0 ) {
			$id = $parent [$this->layer [$id]] = $this->parent [$id];
		}
		
		ksort ( $parent );
		reset ( $parent );
		
		return $parent;
	} // end func
	

	/**
	 * Short description. 
	 *
	 * Detail description
	 * @param      none
	 * @global     none
	 * @since      1.0
	 * @access     private
	 * @return     void
	 * @update     date time
	 */
	function getChild($id) {
		return $this->child [$id];
	} // end func
	

	/**
	 * Short description. 
	 *
	 * Detail description
	 * @param      none
	 * @global     none
	 * @since      1.0
	 * @access     private
	 * @return     void
	 * @update     date time
	 */
	function getChilds($id = 0) {
		$child = array ($id );
		$this->getList ( $child, $id );
		
		return $child;
	} // end func
} // end class


?>

